Bryan Cranston says the book, due out in 2015, will feature both “useful” and “dangerous” lessons that he learned while playing science teacher-turned-meth kingpin Walter White in the hit AMC show set in Albuquerque

Bryan Cranston is also the one who knocks, apparently. The actor behind Breaking Bad’s notorious protagonist Walter White is prepared to disclose some “secrets and lies” in his memoirs that are set to be published in the fall of 2015, according to the Associated Press.

Cranston also revealed that the book will feature both “useful” and “dangerous” lessons that he learned from his time spent in character as the science teacher cum methamphetamine kingpin.